Fortis Manufacturing Low Profile Gas Block .750 Stainless Steel AR-15
Fortis Manufacturing, Inc.
$52.69
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Fortis Manufacturing, Inc.
Fortis Manufacturing Low Profile Gas Block .750 Stainless Steel AR-15
The Fortis Manufacturing Low Profile Gas Block in .750 stainless steel is a precision-engineered upgrade designed to work seamlessly with modern match-grade AR-15 barrels, delivering reliable gas regulation without sacrificing a clean, streamlined handguard fit.
- Low profile design clears free-float handguards for a sleek, modern build
- Crafted from durable stainless steel for corrosion resistance and long-term reliability
- Fits standard .750 diameter barrel gas seats found on most AR-15 barrels
- Dual set screw attachment secures the block without marring your barrel finish
- Set screw spacing of 0.470 inches for precise, stable barrel indexing
- Includes roll pin and two set screws — ready to install right out of the box
Who This Is For
This gas block is ideal for AR-15 builders and owners upgrading to a free-float handguard system, running a match-grade or precision barrel, or simply replacing a worn or bulky standard gas block. Whether you're assembling a competition rifle, a lightweight patrol build, or a custom range gun, the Fortis Low Profile Gas Block offers a no-fuss, precision-fit solution that installs cleanly and performs consistently.
Specifications
| Brand | Fortis Manufacturing, Inc. |
|---|---|
| Material | Stainless Steel |
| Barrel Diameter | .750 inches |
| Profile | Low Profile |
| Attachment Method | Dual Set Screws |
| Set Screw Spacing | 0.470 inches |
| Includes | Roll pin, two set screws |
| Compatible Platform | AR-15 |
| Finish | Natural Stainless |
Frequently Asked Questions
Will this gas block fit under my free-float handguard?
Yes. The Fortis Low Profile Gas Block is specifically designed to fit beneath free-float handguard systems. Its slim, low-profile form factor keeps the overall diameter well below the bore of most standard and extended free-float rails, making it compatible with the vast majority of aftermarket AR-15 handguards on the market today.
Will the set screws damage or mar my barrel during installation?
Fortis designed this gas block with careful attention to installation. While some builders choose to dimple their barrel for added security and to reduce the clamping force needed, the dual set screw design provides a firm, reliable hold without requiring excessive torque. Using the included set screws with a quality hex key and proper torque spec will keep your barrel finish in great shape.
How do I know if my barrel uses a .750 gas seat?
The .750 inch gas block diameter is one of the most common sizes for AR-15 barrels, typically found on government-profile, SOCOM-profile, and many mid-weight barrels. You can verify your barrel's gas seat diameter with a caliper by measuring the barrel at the gas port location. If you're unsure, your barrel manufacturer's specifications will list the correct gas block journal diameter.
